Fire-extinguishing composition



UNITED STATES PATENT OFFICE.

JOSEPH LE ROY wsnnnn, or. SYRACUSE, NEW YORK.

FIRE-EXTINGUISHING COMPOSITION.

SPECIFICATION forming part of Letters Patent No. 569,731, dated October 20. 1896.

- Application filed March 16, 1896. Serial No. 583,294. (No specimens.)

To all whom it may concern:

Be it known that I,JsEPH LEROY WEBBER, of Syracuse, in the county of Onondaga, in the State of New York, have invented .new and useful Improvements in Fire-Extinguishing Compositions, of which the following isa full, clear, and exact description.

"in the use of a concentratedaqueous solution of calcium chlorid, the degree of concentra The object of my invention is to provide an improved vehicle for certain substances, such ,as carbon dioxid, (commonly called carbonic-- acid gas,) magnesium chlorid, hydrochloric acid, sodium chlorid, &c. which are employed as fire-extinguishing agents. .q

' The fire-extinguishing liquids now employed will freeze when exposed to the extreme cold of winter weatherpvhich is a serious objection, especially when such liquids are kept in yards, sawmills, barns, or other localities where there is no artificial heat.

To this end my invention consists, broadly,

tion being proportioned according to the temperature atwhich the liquid .will con geal, takquently useless. 1

A solution of calcium chlorid may be made to withstand the low temperature of minus 45 centigrade (minus 49 Fahrenheit) witln out freezing, and itis known and has been shown by reports prepared in the ofiice of the Chief of the Weather Bureau of the United States Department of Agriculture that a temperature lower than49 below zero Fahrenheit is seldom reached in the United States.

Solution calcium chlorid is superior to other substances not only on account of its non freezing quality, but because of its cheapness, and also because of its non-poisonous nature even when combined with magnesium chlorid or carbon dioxid.

extinguishing solutions now in use are exceedingly dangerous to the user, as they depend upon the use of oilof vitriol.

In carrying out my invention in a practical.

way I first prepare a concentrated solution of tieme cold weather.

There is no danger attending the useof my solution, while many fire-' calcium'chlorid by dissolving one hundred pounds of c'rude'calcium chlorid in one hun- .55 dred pints of water.- This solution has the specific gravity of about 1.35 at Fahrenheit and when filtered or otherwise. clarified v is ready'for use asa vehicle for magnesium 1 chlorid,carbon dioxid,hydrochloric acid, &c. 60 The value of magnesium chlorid as a fire extinguishing agent consists in rendering combustible material practically in'combusti ble. Hydrochloric acid and carbon'fldioxidunder'pressu're and contained in a suitable apparatus possess the property of extinguishing flame. When the solution of calcium-.chlOrkl is combined with magnesium chlorid, I add to one hundred' pints of the concentrated solu' tion of calcium chlorid, as above described, ten pounds crystallized magnesium sulfate, and then apply heat to the liquid to hasten v the chemical reaction, which results in the formation of av precipitate consisting of cal--45 cium sulfate, while the liquid portion contains magnesium chlorid and calcium chlorid in propel-proportion for its use during ex: The solution is then separated from the insoluble calcium sulfate by filtration or decantation after the calcium sulfate has settled to the bottom of the con-' taincr. This solution can be diluted: with water, the proportion of the latter being fixed according to the' temperature at which it isdesired that the liquid should not freeze. \Vhat I claim i'sq 1. A fire-extinguishing liquid containing a concentrated solution of calcium chlorid and charged with carbon dioxid, as set forth. o 2. A fire-extinguishing liquid containinga concentrated aqueous solution of calcium chlorid, magnesium chlorid, and charged with carbon dioxid, substantially as specified.

3. A fire-extinguishing liquid, containing a concentratedv aqueous solution of calcium w .ch lorid,'magnesium chlorid, sodium chlorid and charged with carbon dioxid, substantially as specified. I

In testimony whereof I have hereunto 10 signed my name. a

. JOSEPH LE- nor Witnesses: I

MARK W. DEWEY, II. M. SEAMANS.

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